Schwarzkopf Professional BC Bonacure pH 4.5 Color Freeze Shampoo is designed for color-treated hair to preserve its vibrancy. It helps seal the hair's surface, restoring its optimal pH level to 4.5, locking in color pigments for lasting vibrancy. This gentle formula also strengthens the hair, preventing color fade and maintaining its shine. Ideal for use after any coloring treatment to extend the life and brightness of your hair color.